I am not sure that Ron needs any defending.. He has stated specifically in the past that he is not a licensed engineer but is a specifier/truss designer that works for a truss company. Based on his past comments he appears to extremely competent and thorough in his approach to truss design and his input in this forum is invaluable. Whether he only has a HS diploma or a PhD, he can run circles around many engineers when it comes to his specific skillset.
With that said, his competency and thoroughness to his designs is not always the case with truss companies/designers, and even with careful attention to detail and an above-average understanding of truss design, engineers are still necessary in the process. You don't know what you don't know... this is true for the designers that are not engineers and for the engineers that are not in the day-to-day of truss input/output.
By the way Ron, your comment on "service and quality" is spot on. Many of us have been underbid based on less than scrupulous competition..
One of the problems with a delegated design component-based systems (like PEMB, wood truss, etc..) is that competition whittles down these commodities to whatever silly thing the next guy down the street is doing. Sometimes for the better, sometimes for the worst. Costs for things like extra bracing (temporary or permanent), quirky installation details, and costs to other trades get lost in the mix. Incorrect loads, performance criteria, and design criteria get used all the time, sometimes without anyone paying attention to where the components are actually being used. Many times the end user may pay more in the end for a "cheap" design. A good engineer in the mix can sometimes help steer things in a direction that is best for the overall project
@jepps3 - I don't think many users on here undervalue Ron. My comment was out of pure curiosity from and I was seeking input from a talented and knowledgeable designer. I assume the same may be true of the other comments that were seen as critical. And all of us engineers on here area used to being seen as the "necessary evil" and to hearing comments from contractors and developers about how everything would be so much better and cheaper if we would just keep our mouths shut and stop worrying so much... that is until something fails..